PJP says:

A little on the large side, but works well. After the motion operated switch that had been controlling the external house lights started not working in wet/damp weather, I decided to replace it.The first replacement that I bought was a total failure. Even on its lowest sensitivity setting it continually switched the lights on with even the lightest of breezes.There are very few options available (at least in the US) with Heath Zenith being almost the only one available. However, these seem to have been moved from a cheap Chinese manufacturer to an ultra-cheap Chinese manufacturer and the quality control seems non existent.After some research the Hubbell motion detector switch looked lke a possibility.Ordered it from Amazon and waited for delivery.When it finally arrived, it very nearly almost went straight back. The packaging had very obviously been re-sealed, and without much care and attention at that. I opened the box, and the unit, although clean, had obviously been installed and then removed (clamp-marks on wires etc.).There were also no wire nuts and the usual bits and pieces you expect with something like this. The instruction leaflet was there though.Since I really needed this working, I decided to try it out anyway, and only return it if I had to.Well, it actually works well. Good immunity to wind and vegetation movement, wide angle detection etc.Probably works better than the old unit.The only other thing worth mentioning is that it is some what large. Its long, and sticks out much more than either of its predecessors. I will forgive this, because it actually works very well.